<clr-vertical-nav [clr-nav-level]="2">
  <a clrVerticalNavLink routerLink="./save" routerLinkActive="active">
    <clr-icon clrVerticalNavIcon shape="floppy"></clr-icon>
    保存
  </a>
  <a clrVerticalNavLink routerLink="./ui" routerLinkActive="active">
    <clr-icon clrVerticalNavIcon shape="ruler-pencil"></clr-icon>
    界面
  </a>
  <a clrVerticalNavLink routerLink="./credit" routerLinkActive="active">
    <clr-icon clrVerticalNavIcon shape="certificate"></clr-icon>
    关于
  </a>
</clr-vertical-nav>
<router-outlet></router-outlet>
